v0.10.0: SICP-inspired redesign

What's New

This release redesigns the package around principles from Structure and Interpretation of Computer Programs (SICP).

New Features

• z_test() - One-sample z-test (simplest primitive)
• fisher_combine() - Combine independent p-values (closure property)
• adjust_pval() - Multiple testing correction (higher-order function)
• confint() - Extract confidence intervals (test-CI duality)

Bug Fixes

• Fixed Wald test p-value calculation (was incorrectly using pnorm on squared statistic)

Improvements

• All test constructors now store their inputs for introspection
• Enhanced roxygen documentation with mathematical formulas
• 83 testthat tests covering all functionality
• Pedagogical vignette explaining the design principles
• Updated README with comprehensive examples

Documentation

• Full pkgdown site at https://queelius.github.io/hypothesize/
• Vignette: vignette("introduction", package = "hypothesize")